<template>
  <div class="app-container">
    课程列表
    <!--查询表单-->
    <el-form :inline="true" class="demo-form-inline">
      <el-form-item>
        <el-input v-model="courseQuery.title" placeholder="课程名称" />
      </el-form-item>

      <el-form-item>
        <el-select v-model="courseQuery.status" clearable placeholder="课程状态">
          <el-option :value="1" label="已发布" />
          <el-option :value="0" label="未发布" />
        </el-select>
      </el-form-item>
      <el-button type="primary" icon="el-icon-search" @click="getPageCourseList()">查询</el-button>
      <el-button type="default" @click="resetData()">清空</el-button>
    </el-form>

    <!-- 表格 -->
    <el-table :data="list" border fit highlight-current-row>
      <el-table-column label="序号" width="70" align="center">
        <template slot-scope="scope">{{ (page - 1) * limit + scope.$index + 1 }}</template>
      </el-table-column>

      <el-table-column prop="title" label="课程名称" width="180" />

      <el-table-column label="课程状态" width="80">
        <template slot-scope="scope">{{ scope.row.status==='Normal'?'已发布':'未发布' }}</template>
      </el-table-column>

      <el-table-column prop="lessonNum" label="课时数" width="60" />

      <el-table-column prop="gmtCreate" label="添加时间" width="160" />

      <el-table-column prop="viewCount" label="浏览数量" width="60" />

      <el-table-column label="操作" width="200" align="center">
        <template slot-scope="scope">
          <router-link :to="'/course/edit/'+scope.row.id">
            <el-button type="primary" size="mini" icon="el-icon-edit">编辑课程基本信息</el-button>
          </router-link>
          <router-link :to="'/course/edit/'+scope.row.id">
            <el-button type="primary" size="mini" icon="el-icon-edit">编辑课程大纲信息</el-button>
          </router-link>
          <el-button
            type="danger"
            size="mini"
            icon="el-icon-delete"
            @click="removeDataById(scope.row.id)"
          >删除课程信息</el-button>
        </template>
      </el-table-column>
    </el-table>

    <!-- 分页 -->
    <el-pagination
      :current-page="page"
      :page-size="limit"
      :total="total"
      style="padding: 30px 0; text-align: center;"
      layout="total, prev, pager, next, jumper"
      @current-change="getPageCourseList"
    />
  </div>
</template>

<script>
//引入调用course.js文件
import course from "@/api/edu/course";

export default {
  //写核心代码位置
  // data:{
  // },
  data() {
    //定义变量和初始值
    return {
      list: null, //查询之后接口返回集合
      page: 1, //当前页
      limit: 10, //每页记录数
      total: 0, //总记录数
      courseQuery: {} //条件封装对象
    };
  },
  created() {
    //在页面渲染之前执行, 一般调用methods定义的方法
    //调用
    this.getPageCourseList();
  },
  methods: {
    //删除课程方法
    removeDataById(courseId) {
      //弹框提醒 -> 删除 -> 刷新列表
      this.$confirm("此操作将永久删除课程, 是否继续?", "提示", {
        confirmButtonText: "确定",
        cancelButtonText: "取消",
        type: "warning"
      }).then(() => {
        course.deleteCourse(courseId).then(response => {
          this.$message({
            type: "success",
            message: "删除成功"
          });
          //刷新页面
          this.getPageCourseList();
        });
      }); //点击取消, 执行catch方法
    },
    //创建具体的方法, 调用course.js定义的方法
    //带分页查询的课程列表
    getPageCourseList(page = 1) {
      this.page = page;
      course
        .getPageListCourse(page, this.limit, this.courseQuery)
        .then(response => {
          this.total = response.data.total;
          this.list = response.data.rows;
        });
    },
    //课程列表的方法
    // getList() {
    //     course.getListCourse()
    //         .then(response => { //请求成功
    //             this.list = response.data.list
    //             console.log(this.list)
    //         })
    // },

    resetData() {
      //清空的方法
      //1.表单输入项数据清空
      this.courseQuery = {};
      //2.查询所有讲师数据
      this.getPageCourseList();
    }
  }
};
</script>